Imran doesn't patch up

Aamir Khan and brother Faisal Khan may have sorted out their differences but it looks like nephew Imran Khan is not in a hurry to forgive or forget Faisal mamu's tirades against the family. Whenever Faisal and Imran face each other, Imran gives Faisal the cold shoulder. "Imran was at Aamir's office for the post production of 'Delhi Belly'. He was sitting at the editing, while Faisal walked into the room and went to greet Imran, but the latter refused to even acknowledge his presence. Faisal felt humiliated and left the room.

Faisal ne kya kiya ji? I heard something about him not being mentally well; care to elaborate?